I watched a program today featuring a P-dog hunt in Wyoming, at the Silver Spur ranch. The hunters where both using AR-15 type rifles in the calibers .204 Ruger and .223.
It was a very good show and informative to say the least. They shot a lot of rounds, over 2000 and even went into showing the viewing folks that firing 20 rapid rounds and getting their barrels hot was not an issue with these rifles or the calibers chosen. Now with very hot barrels they fired at a target to see if the guns held zero or tight enough groups.
They shot 1-MOA on the target and I would have thought the group size would be larger but I was wrong I suppose. It was a good show and I came away thinking there is not much difference between the two calibers, other than a big difference in velocity with the .204 using a 32 grain bullet. However, the .223 with heavier bullet was better at long range.
